Joint binder



April 29, 1924.

E. C. GLARDON JOINT BINDER Filed April 9. 1923 Figa 75294.

wnor man@ da@ AVimsas @www mwwvime, mund/(M0 (40444 Patented Apr. Z9, i924.

EDOUARD CHARLES' GLARDON, OF HAMBURG,

GERMANY.

JOINT BINDER.

Application filed April 9, 1923. Serial-No, 630,867.

To all whom t may concern:

Be it known that I, EDOUARD CHARLES.

GLARDON, a citizen of the Swiss Republic,V

ments connected with joint binders, such as are used for binding together wooden planks, boards and the like and especially for securing the lids or covers on chests and boxes to safeguard the contents of the latter a0 inbg. had thereto. More particularly the invention relates to that known yclass of joint binders, which consists of-a U-shaped safety clamp, the perforated shanks of which are to be driven into the two parts tobe secured together, and of a fiat barbed nail whichris driven into the said two parts and through the perforations of the shanks until its head iscountersunk in one of those parts, tok prevent the clamp from being withdrawn without leaving evidence that it had been tampered with.

The flat nails hithertoforeused in connection with joint binders ofthe class referred to do not afford a reliable protection against the withdrawal of the clamps, for the reason that it is possible by means of special pliers or forceps to withdraw the nail, thus liberating the clamp and enabling same to be withdrawn and to be reinserted without noticeable traces.

The arrangement of barb at the two lateral edges of the fiatnails, which was provided for to prevent the withdrawal of the nail; has not proven effectual in practice. In spite of these barbs it has been possible to extract the nails by means of special pliers or forceps and in consequence to withdraw the clamp and to open thebox without noticeable traces.

In order to obtain a better protection against fraudulent opening ofthefboxes it has been proposed toepro'vide the flat barbed nail' at its head `with an extension,` which was weakened atits base, the-weakeningbeing carried so far,y that theheadextension remained strong enough to receive the blows of the hammer or other instrument used for driving home the nail, but that it-wassev ered or torn off Afrom the head of the nail if an attempt was made to extract the nail.

-ainst pilfering and fraudulent access be The unavoidable variations in the qualityA of the material employed in thel manufactureof such fiat barbed nails render ity impossible to warrant the tearing` off of the head extension in the unauthorized attempt to extract the nail, so that the protection aimedrat by the weakened head extension of the nail is not effective in every case.

In order to render ecctive the protection aimed at by the use of the aforesaid U- shaped safety clamps and the fiat barbed nails in connection therewith means must be provided by which the extraction of the nails is impossible even if special liers or forceps are employed which are at apted to grip the nails by their head portion with out noticeable traces.

According to the present invention these means consist in the combination with the flatfbarbed nails of a detachable head member produced separate from thenails but attached te same in such a manner that the countersunk nails are unaccessible to pliers or forceps for the unnoticeable extraction of the nails even if it has been possible to get hold of their detachable head member and extract same.

-In the annexed drawingl are shown, by way of example, several modes of carrying into practice this invention. l

Fig. l is a rfront elevation of the improved fiat barbed nail with its separately produced detachable head member ready for use inA securing U-shaped safety clamps.

Fig. 2 is an edge view of Fig.l l.

Fig.` 3 is a front'elevation of the, improved fiat barbed nail with its separately produced head member detached therefrom.

Y `Fig. is a front elevation of a modified construction ofY the improved fiat barbed nail andofits separately produced detachable head member ready for use in securing U-shaped safetyy clamps. n,

Fig; is a. front elevation of the improved fiatbarbed nail according to Fig. t withits separately produced head kmember detached therefrom.

Fig. 6 is a front elevation of another modiliedV construction of the improved flat barbed nail and of it-sv separately produced detachable head member ready for use vin securing U-shaped safety clamps.

Fig. Tis a front elevation of the improved flat" barbed nail according to FFig.' 6V withits separately produced head member detached therefrom,

Fig. 8 is a top view of the detachable head -member according to Figs. 6 and 7.

Fig. 9 is atop view ofthe improved'fiat `barbed nail according to Figs. 6 and 7 after Vthe detachable head member has been removed.

Fig. 10 is a front elevation of another modified construction of the iniprozved flatv barbed nail with its separately produced detachable head member ready for use'in sejcurin'g U-shaped safety clamps. f

tion.- K

Referringyfirst to Fig. '11, d designates l Fig. 1l is a sectional detail view of a portion of a box and its lid with one of the VU-shapedsafety` clamps and one of the improved flat barbed nails in operative posi- Y the cover of afbox and e 'the body of the box.

The cover is secured to the body by means of U-shaped safety. clamps (only one of which is-shown having a cross-head a and and into the body e orn the boX.

legs or Shanks b, c provided with apertures.

In use, theclainps are driven into the body `*of the boX and cover and one of the .nails g is driven Vthrough the cover d, Shanks Z), c

The nail g corresponde in shape and dimensions'to the fiat barbed nailsV well known in connection with U-shaped safety clamps of the kind referred'to.

` According to the present invention the flat barbed nail gis provided with a separately produced head member`- f, which is detachably secured to the nail in such a manner that itis adapted to safely Vreceive the blows'of the hammer or other instrument used for driving home the nail.

.In Figs. l to 3 the separately produced detachable head member/fis lpartly splitV or,

bifurcated as clearly shown in Fig. 3 by the reference letter The head member f in `its attachment to the nailfg sits vlike a rider on a horse.

so that the blows of the hammer or other.'V

In order to secure a firm seat,

instrument used for driving home the nail do not dislodge the head member f, the two Shanks of the latter formed bythe slot or bifurcation fl are-firmly closed against the shaft of the nailg.l VTothis end in Figli.

the shaft 'of the nail g is provided in anyY suitable manner with a'grooveg1 to be engaged by the lower bifurcatedextremity f1 of the headfmember f. It suffices toprovide such a groove g1 on one side of the shaft of the nailpg, but itis obvious 'that a groove g1 may be provided on both sides ofthe nail g if'. desired.

- Thev modified construction off the-im-V proved fiat barbed nail and of itsV separately produced detachable head -membe`r illustrated inFigs. 4 and 5 differs from the construction VshownV and described with reference toFigs. Vl to 3 only in regard to the seat lfor the detachable head member f,

a slotfg2 beingy provided at Vthe top portion yby the detachable head member of the nail g which forms a saddle for a firm seat. Ink pushing the detachable head mem- ,ber with its bifurcated extremity f1 Yover the nail g it fills the saddle like slot g2 and thus gains a firm vseat to withstand the blows of the hammer or other instrument used for driving home thenail.

Themodified constructiony of the improved iiat barbed nail andof itsseparately produced detachable head member illustrated in Figs. 6 'to 9 differs from the construction shown-'and described vwith reference to Figs.

l to 5 the employment of a wedge-shaped i head memberf, which gains a firm seat in a slot g3 at the top portion of' the'nail g.

Accordingto Figs. 6 to 9 the connect-ion between the nail g and the detachablehead member kis safeguarded by guide groovesV 2 rovided-at the lateral edges `of the head member has ndicatedin Fig. 8. In push.

ing the'. detachable-head member f into the slot g?, the edges bordering the latter engage .the guide grooves f2.' The arrangementmay vbe reversed by providing the edges .bordering the slot g3 with guide grooves, Vwhich are engaged by the lateral edgeso-f the detachable head member f when the latter isv'pushed into the slot g3.

The. several constructions illustrated and 'f described with referencefto Figs. l to 9 have inv Ycommon the arrangement, Vthat the Vconsey nection between the nail "g and its detachof the nail g, that it is not 'completely filled p f in connecting same with thenailg. i

To receive the blows otthehammer orv other instrument used 'for driving'home'the i nail g. the detachable head VVmember f in each ofthel constructions illustrated andy described with reference to Figsil to l0 forms' an extension, which is indicated by the reference letter L in Figs.V 1,2,44`, 6

ndjlo,V 'i' 'Y y Should an attempt be made withsuitable Vpliers or forceps to extract theinail fromk its operative position, which `is' illustrated in Fig; Vl1, the countersunk head-extension hrmay be gripped, 'sothat in pullingl the head member f is detached from the nail g,

whereas the latter remainsl in its .operative position. After the extraction ofthe detachable head member f the nail g rests at such a'depth with its top portion, that in the attempt to reach it marked damaging of the'wood results,which is clearly perceptible even on al cursory inspection of` Y. l YV13oY the box.

Anl attempt to drive the nail g entirely through both shanks b, c of the U-shaped clamp is condemned to failure in view of the fact that the two lateral wings c integral with the top portion of the nail g project beyond the barbs z', and are turned out of the plane of the barbs, so that they abut against the shank b of the Clamp as indicated in Fig. ll.

The construction of my improved fiat barbed nail and its separately produced detachable head member illustrated and described with reference to Fig. 10 is advantageous for the reason that in the attempt to drive ,the nail g entirely through both shanks Z), c of the U-shaped clamp the blows of the hammer received by the head extension 7L force the head member f deeper into the slot g3, the head g with its wings Z2 resting on the shank being thereby extended and effectively prevented from passing through the shank.

The improved detachable head member f shown in Figs. l to 5 in the shape of a rider, in Figs. 6 to lO in the shape of a wedge may be constructed to simultaneously form the wings 70 which project beyond the barbs z', j of the nail g and which are destined to abut against the shank b of the U- shaped clamp when the 'nail is driven home into its operative position.

I wish it to be distinctly understood that I do not limit my invention to the several shapes and forms of the at barbed nail and of its detachable head member shown in the drawing, it being obvious that various modifications in the shapes and forms may be carried out without departing from they 1. In a joint binder the combination with a U-shaped clamp, the two shanks of which are perforated and adapted to enter the two members to be secured together, of a s fiat barbed nail adapted to be driven into the said two members and through the perforation ofV the shanks, a separately produced head member being detachably secured to the top portion of the nail for receiving the blows of a hammer or other instrument used in driving home the nail, substantially as described and for the purpose set forth.

2. In a joint binder the combination with a U-shaped clamp, the two shanks of which are perforated and adapted Vto enter the two members to be secured together, of a flat barbed nail adapted to be drivenvinto the saidy two members and `through the perforation of the shanks, a. separately profduced head member being detachably rsecured to the top portion of the nail kfor receiving the blows of a hammer or other instrument used in driving home the nail,

said head member being wedge-shaped and gaining a iirm seat at the top portion of the nail in a slot thereof, substantially as described and for the purpose set forth.

3. In a joint binder the combination with a U-shaped clamp, the two shanks of which are perforated and adapted to enter the two members to be secured together, of a fiat barbed nail adapted to be driven into the said two members and through the perforation of the Shanks, a separately produced head member being detachably secured to the top portion of the nail for receiving the blows'of a hammer or other instrument used in driving home the nail, said head member being wedge-shaped and gaining` a rm seat at the top portion of the nail in a slot thereof, the slot extending beyond the normal seat of the head member,

Vsubstantially as described and for the pur- EDOUARD CHARLES GLARDON.

Witnesses:

HERMANN Dnroxn, .Y ERM. KAsPARoH. 

